Just a year ago, television host Ellen DeGeneres predicted the name of Paris Hilton’s baby boy on her show. Now, the socialite has revealed the name of her firstborn with husband Carter Reum: Heiress Diana Hilton Reum.

The news was announced on social media, with Paris Hilton sharing a series of sweet photos of her and Carter with their new baby. Hilton captioned the post, “We are so excited to welcome Baby Heiress Diana Hilton Reum to the world.”

The name of the baby had been a closely-guarded secret until now. Last year, Ellen DeGeneres had predicted the name of the baby on her show. She had said, “I’m going to guess the name of the baby is Heiress Diana Hilton Reum. What do I win? A hotel?”

In a recent interview with PEOPLE, Hilton said, “When we heard Ellen had guessed it, we thought it was so funny and perfect. We were like, ‘Oh, that’s it!'”

The couple also revealed the name of their baby on their respective Instagram accounts. Carter Reum wrote, “We are so blessed to welcome our beautiful daughter, Heiress Diana Hilton Reum, into the world.”

The couple, who got married in February, are now overjoyed with the arrival of their first child. Hilton said, “We are feeling so blessed, grateful, and excited to start this new journey of parenthood together.”